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GM exploring ways to raise half-ton Duramax diesel tow rating

Lots of truck owners cheered when GM announced fuel economy numbers for the 2020 Chevrolet Silverado with the 3.0-liter Duramax diesel inline-six. Even after Ram let loose its EPA mileage ratings for the 2020 Ram 1500 EcoDiesel, the Chevy oil-burner still took the trophy. The victory was years in the making, GM engineers spending an entire four-year development cycle refining the LM2 Duramax to increase mileage. The tradeoff, as well all know by now, is towing; the Duramax in half-ton duty pulls a maximum 9,300 pounds in the Silverado. Rivals across town can do more, the Ford F-150 PowerStroke rated at 11,500, the Ram 1500 EcoDiesel game to pull 12,560. GM engineer John Barta told Muscle Cars & Trucks that more hauling chops could be on the way, explaining, "We’re actually looking at upgrading some of the materials around (the engine bay) to see if we can maybe raise our tow rating." Engine bay materials are at issue due to thermal complexities underhood. John Barta, GM's assistant chief engineer of diesel engine controls, said the Duramax's inline-six configuration allowed engineers to get emissions hardware like the combined selective catalytic reduction, diesel oxidation catalysts, and diesel particulate filter unit closer to the engine, where it heats up quicker, getting emissions down quicker. But that filter puts another heat source in those confines, enforcing a cap on the tow rating to keep the engine and other systems from overheating. "If you look under the hood," he said, "youÂ’ll see a significant amount of silver ‘moon tapeÂ’ around to make sure things arenÂ’t getting overheatedÂ… if we were to go up in higher towing, which we can, we start impacting the possibility of deteriorating some of the components.” There isn't much space for more grille, so swapping for a better grade of "moon tape" or a different kind of material could reduce engine bay heat, extracting a higher tow rating in the process.  It's important to note a point Barta's been making for months about the Duramax figures, though. "Even though itÂ’s nice to brag about big numbers, in reality, light duty customers are not towing that large with their trucks," and, "We do know that (95 percent) of our light duty customers donÂ’t tow over 9,000 pounds." On our First Drive of the 2020 Silverado diesel we called out the tow rating, but emphasized that the Chevy and GMC have more important challenges to overcome.

GM reports third straight sales drop in China in 2020

BEIJING — General Motors' vehicle sales in China fell 6.2% in 2020, as the U.S. automaker suffered a prolonged slowdown in the world's biggest auto market. GM, China's second biggest foreign automaker, delivered 2.9 million vehicles in the country last year, the company said on Wednesday, for a third straight decline in annual sales. But sales have been recovering in the second half of last year, up 12% between July and September and 14% in the final three months. GM has a Shanghai-based joint venture with SAIC Motor, in which the Buick, Chevrolet and Cadillac vehicle brands are made. It also has another Liuzhou-based venture, with SAIC and Guangxi Automobile Group, in which they make no-frills minivans and have started to make higher-end cars. Sales of its Buick brand grew 4% on the year and Wuling rose 9%, the statement said. Luxury brand Cadillac's sales increased 8%. Sales of GM's more affordable Baojun brand dropped 33% last year, while sales of its mass-market Chevrolet tumbled 30%. GM's delivery of 2.9 million vehicles in China follows 3.09 million vehicles in 2019, 3.65 million vehicles in 2018, and 4.04 million in 2017, for a three-year decrease of 28%.

Goodbye Chevy Bolt, hello baby Ram and electric Chrysler 300 replacement? | Autoblog Podcast # 779

In this episode of the Autoblog Podcast, Editor-in-Chief Greg Migliore is joined by Senior Editor Jeremy Korzeniewski. They kick things off this week with some news. The Chevy Bolt and Bolt EUV will be discontinued. The McLaren 750S gets revealed and a four-door new flagship McLaren are rumored. Did Chrysler show dealers an electric 300 replacement, did we spy a new compact Ram, and are we closer to a production version of the Genesis X Convertible? Also, Greg recently visited Michigan Central Station, which Ford is revitalizing. In this week's fleet, your hosts discuss driving the Genesis Electrified GV70, Chevy Tahoe RST Performance Edition and the Polaris RZR XP. Finally, they take to Reddit for this week's "Spend My Money" segment. Send us your questions for the Mailbag and Spend My Money at: Podcast@Autoblog.com. Autoblog Podcast # 779 Get The Podcast Apple Podcasts – Subscribe to the Autoblog Podcast in iTunes Spotify – Subscribe to the Autoblog Podcast on Spotify RSS – Add the Autoblog Podcast feed to your RSS aggregator MP3 – Download the MP3 directly Rundown News Chevy Bolt EV and EUV, two of the most affordable EVs, ending production McLaren 750S revealed, adding power and lightness to the old 720S McLaren reportedly confirms four-door model and next flagship supercar Chrysler reportedly showed its dealers an electric 300 replacement Ram small pickup truck spy photos show scaled-down 1500 looks Are we closer to a production version of the Genesis X Convertible? Bill Ford's dream takes shape: Historic Detroit building turns tech incubator Cars we're driving 2023 Genesis Electrified GV70 2023 Chevy Tahoe RST Performance Edition 2024 Polaris RZR XP Spend My Money: Swap a 2023 Kia Stinger GT2 AWD for a 2022 Audi SQ5 Prestige? Feedback Email – Podcast@Autoblog.com Review the show on Apple Podcasts Autoblog is now live on your smart speakers and voice assistants with the audio Autoblog Daily Digest. Say “Hey Google, play the news from Autoblog” or "Alexa, open Autoblog" to get your favorite car website in audio form every day. A narrator will take you through the biggest stories or break down one of our comprehensive test drives. Related video: Podcasts Chevrolet Chrysler Ford Genesis McLaren RAM Truck Convertible Coupe Crossover SUV Electric Future Vehicles Luxury Performance Supercars Sedan